Re: [REGRESSION] PCI/AER: MacBookPro16,1 powers off ~20 s after boot

[Thorsten Leemhuis]

On 10/6/26 23:19, Lukas Wunner wrote:
> On Tue, Oct 06, 2026 at 12:37:18PM -0400, Alex Deucher wrote:
>> On Mon, Oct 5, 2026 at 7:19 PM Bjorn Helgaas <helgaas@xxxxxxxxxx> wrote:
>>> Alex reported something similar at
>>> https://bugzilla.kernel.org/show_bug.cgi?id=222095.
>>
>> Lukas' patches fixes some boards, but unfortunately, I'm still seeing
>> failures on others.  Reverting the patch fixes those failures.  I've
>> updated the ticket.
> 
> I've added an analysis of the dmesg output as well as a patch.
> It looks like the BIOS is raising a false alarm in that it signals
> a Fatal Error even though the Uncorrectable Error Status register is
> blank.  The patch causes such events to be reported, but otherwise
> ignored (i.e. no recovery is attempted for a false alarm).
> 
> Newly enabled functionality like Advisory Non-Fatal Errors causes
> BIOS code paths to be exercised which likely haven't been tested
> by firmware validation folks, hence the fallout.  However I believe
> ultimately we *want* to see those errors being reported because they
> may point to BIOS issues which flew under the radar so far.
Well, not disagreeing, but given that we have two regression reports
(one speaking about multiple machines being broken) and we are close to
-rc7 I wonder:

Is this something we should quickly revert or disable for now and retry
again later? Maybe multiple mainline devel cycles if needed?

Ciao, Thorsten